Well everyone is giving you fairly correct info so i don't have much to add. This looks like an old Javanese keris with pretty good age to it. Unfortunately much of the ricikan (features) have been lost to erosion, probably from extensive washing.
Definitely a Moro gunong hilt, but i'm not sue if i agree with Tom that it was hilted by a Moro only because i think a Moro wouldn't find a blade like this all that useful. It is relatively frail compared to Moro blades and really only effective (this one at least) as a stabber. But then, who knows.
I agree with Rick that your pamor would have a specific "meaning" per se, but rather a more general nature.
Interesting mismatch of hilt and blade. I would suggest you get a "proper" hilt fot it, but then there seems to be some history working here, no matter how muddled, that should probably be preserved.